All facts — Page 6

Honeydew melons and watermelons belong to the exact same botanical family.

Both belong to the Cucurbitaceae family, which also includes cucumbers, pumpkins, and zucchini. Despite having…

Woolly mammoths were still alive when the Egyptian pyramids were being built.

While the Egyptians were erecting the great pyramids, a small isolated population of woolly mammoths survived on…

Hoatzin chicks are born with claws on their wings.

The hoatzin is a unique Amazonian bird whose chicks have functional claws on two of their wing digits. They use them…

The human cornea gets oxygen directly from the air.

Unlike most body tissues, the cornea has no blood vessels. It absorbs oxygen directly from the atmosphere and eye…

George Washington did not have wooden teeth.

His famous dentures were made of ivory, gold, lead, and even animal or human teeth. The idea that they were wooden is…

The first photograph of a person took ten minutes to expose.

In the famous image of the Boulevard du Temple in Paris, the street looks empty because the traffic didn't stay still…

Diamonds can burn if heated to a high enough temperature.

Since diamonds are made of pure carbon, they can combust in the presence of oxygen if the temperature reaches about…

The metal gallium melts in the palm of a human hand.

The melting point of gallium is about thirty degrees Celsius. Since the human body temperature is around thirty-seven…

Rhubarb leaves are highly toxic to humans due to oxalic acid.

Although rhubarb stalks are edible and used in desserts, its leaves contain high concentrations of oxalic acid, which…

Mount Chimborazo in Ecuador is the point on Earth's surface closest to space.

Due to the Earth's equatorial bulge, the summit of Mount Chimborazo is farther from the planet's center than Mount…

The University of Al Quaraouiyine in Morocco is the oldest existing, continually operating higher educational institution in the world.

Founded in 859 AD by Fatima al-Fihri, this university in Fez is recognized by UNESCO and Guinness World Records as…

Venus rotates on its axis in the opposite direction to most other planets in the solar system.

This retrograde rotation causes the Sun to rise in the west and set in the east on Venus, a unique phenomenon among…

The first computer mouse, invented by Douglas Engelbart in 1964, was carved out of wood.

This primitive device, called an 'X-Y position indicator for a display system', had a single button and two metal…

Some species of land snails can sleep continuously for up to three years to survive harsh weather conditions.

This prolonged state of dormancy, called estivation, allows them to seal their shell and conserve moisture during…

The masseter, or jaw muscle, is considered the strongest muscle in the human body relative to its size.

This muscle is responsible for closing the jaw during chewing and can exert a surprisingly high bite force…

There are significantly more trees on Earth than estimated stars in the Milky Way.

It is estimated that there are over three trillion trees on Earth, while our galaxy contains between one hundred to…

The very first domain name ever registered on the internet was symbolics.com, created in March 1985.

This historic milestone on the World Wide Web was registered by Symbolics Computer Corporation, marking the beginning…

The aye-aye uses its elongated middle finger to find insects inside trees.

This primate from Madagascar taps on wood to hear the sound of grubs and then cracks the bark with its teeth. It then…

Bees can be trained to detect landmines through their sense of smell.

The sense of smell of bees is so sensitive that they can detect explosive vapors in the soil. Scientists train them…

The human stomach gets a completely new lining every few days to prevent it from digesting itself.

Stomach acid is so strong it could dissolve metal. To prevent its own walls from being destroyed, the organ produces…

Pineapples take about two years to grow and ripen on a single plant.

Unlike many fruits that grow on trees, the pineapple grows on the ground from a herbaceous plant. The process is…

In Longyearbyen, Norway, it is technically illegal to die.

The ground is permanently frozen, which prevents the decomposition of bodies and could preserve deadly viruses…

The shortest commercial flight in the world takes about two minutes and occurs in Scotland.

The route between the islands of Westray and Papa Westray is only two and a half kilometers long. Under ideal…

There is a desert in Antarctica that has not seen rain for nearly two million years.

The McMurdo Dry Valleys are the driest place on Earth. Katabatic winds evaporate any moisture and the mountains block…